Variable-speed power-transmision mechanism.



No: 690,586. `|=atnted1m1.7,\|902.-Y y i w. L; JunsoN.

'V'RABLE SPEED PWER TRANSMISSION MECHANISM.

(Appiication med nu. s, 1901.) (No4 Model.) 7 Sheets-Sheet l.

Patented I an. 7, 1902.

w. L. .lunson I VARIABLE SPEED POWER TRANSMISSION MECHANISM.

Sheet 2,

(Applicatn filed Mar. 5, 1901.)

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No. 690,586. Patented 1an. 7, |902.

w. L. JunsoN. VABIABLESPEED POWER TRANSMISSION MECHANI'SM.

(Application filed Mar. 5, 1901.)

7 Sheets-'Sheet 3.

' (No` Modal.)

Patented lln. 7, 1902.

w. L. lunson.. VARIABLE SPEED POWER TRANSMISSION MECHANISM.

(Apiicaton led Mar: 5, 1901.)

7 Sheets-Sheet 4.

` (No Model.)

` Tuinonms PETERS ca. PNOTDJLITNO.. wuuluuou. D. c.

' No. 690,586. Patented 1an, 7, |962.

- w. L. JunsoN.

VARIABLE SPEED POWER TRANSMISSION MECHANISM.

(Application led Mur. 5` 1901.)

-7 Sheets-Sheet 6.

(No Model.) l

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TH: Nonnls creas c6., Mmmm wAsHmoToN n c No. 690,586. Patenteuilan. 7., |902. w. L. Junso'u.

yABlA-BLE SPEED'POWEB TRANSMISSION MECHANISM.

(Application maI mar. 5, 1901.) (Nn Model.)

7 Sheets-Sheet 7.

TM: nomme @Evans co.. Pgicjrcrurno.; wAsmNm'oN: n. c:

' For each crank there is a reciprocating cross- UNITED STATES PATENT OEEICE.`

wH'ITcoMB L. JUDsoN, oF CHICAGO, ILLINoIs.

VARIABLE-SPEED POWER-TRANSMISSION MECI-IANIISIVILv SPECIFICATION forming partof Letters Patent No.690,586, dated January 7,1902.

Application filed March 5. 1901. Serial No. 49.700. (No model.)

To @ZZ whom it may concern:

Be itknown that I, WHI'rcoMB L. J UDsoN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Variable Speed Power- Transmission Mechanism; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My present invention relates to variablespeed power-transmission mechanism, and has for its obj ect to improve the same in point of simplicity and efficiency and to especially meet the requirements of heavy transportation service, such as in heavy railway motorcars. l To the above ends the invention consists of the novel devices and combinations of devices hereinafter described, and defined in the claims.

In the accompanying drawings my improved powertransmission mechanism is shown as designed for very heavy work, and the general features of construction therein embodied may be briey outlined as follows: A constantly-running driving-shaft which receives its motion from a suitable motor is provided with three cranks set onehundred and twenty degrees in advance ot' each other.

head. The cross-heads are of course mounted in suitable guides, and in the illustration given they work vertically. The cross-heads are bifurcated, and in the sides of the same are pivotally mounted laterally-spaced pairs ofwrist-blocks. Oscillatingleversaremounted to slide endwise through diametrically-cut seats in the faces of the cooperating wristblock, and these levers. are pivotally fulcrumed to a common adjustable fulcrumblock. The free or vibrating ends of the three oscillating levers are connected by suitable pitmen, one to each of the three drivingcranks. By adjustments of the fulcrumblock the vibrating or free ends of the several oscillating levers may be projected more or less through the wrist-blocks, so that under the constant or unvarying strokes of the cranks and pitmen a variable throw may be imparted to the cross-heads. By adjusting `levers are given full movements.

the pivotal connections between the oscillatinglevers and the fulcru m-block into concentrieitywith the axes of the wrist-blocks-.the cross-heads-are caused to stand still', while the'zdriving-cranks, pitmen, and oscillating For action on the driven shaft a pluralityof clutches areprovided, and these clutches are in the preferred arrangement connected to the cross-heads in reversely-'acting pairs by means of suitable links. Under the variable `reciprocations of the cross-heads the clutches are given variable throws, so that a variable motion may be imparted from the driving- 'shaft to the driven shaft.

In the accompanying drawings, like characters indicate like parts throughout the several views.

Figure lis a front elevation of the improved power-transmission mechanism. Fig. 2 is a side elevation ot' the same. Fig. 3 is a vertical section on the line w3 w3 of Fig. l. Fig. 4 isa vertical section onl the linea4 m4 of Fig. 1, some parts being removed. Fig. 5 isa vertical section on the line x5 x5 of Fig. .1.4 Fig. 6 is a horizontal section approximately on` the line @c9906 of Fig. 1. Fig. 7 is a vertical.;sec tion throughthe cross-head guides approximately on the line m7 007 of Fig. 6, some parts beingremoved and others beingbroken away. Fig. 8 isa horizontal section approximately on the line :1:8 m8 of Fig. 3, illustrating the clutch mechanism. Fig. 9 is a View, partly in plan, partly in horizontal section, and'with some parts broken away, showing parts of the'clutch mechanism drawn'apart. Fig. 10 is a plan View of one end of the so-called clutch-reversing cage. Fig. ll is an end elevation of the parts shown in Fig. l0, and

Fig. l2 is an end elevation of lthe so-called j IOO with. the three. .cranks indicated `by the numeral 3' and set, as already indicated,-;one hundred and twenty degrees in advance of each other. A heavy vertically disposed skeleton framework 4 is provided with upper journal-boxes 5, in which the driving-shaft 1 rotates, and with lower journal-boxes 6, in which the driven shaft or axle 2 rotates. The cranks 3 work between the upper boxes 5 and hold the frame 4 against lateral movements. The intermediate vertical portion of the frame 4 is divided to form suitable cross-head guides 7, which, as shown, are provided with removable side plates 8,which plates when removed permitthe cross-heads to be placed in working position or to be relnoved. (For this construction see particularly Figs. and 7.) The cross-heads,which of course work in the crosshead guides 7, are, as shown, made up of laterally-spaced plates 9, connected by pairs of heavy studs l0, which studs, it will be hereinafter noted, serve also as wrist-pins. In each plate 9 of the cross-heads is rotatively mounted the disk-like hub of a Wrist-block 11, which wrist-blocks are provided with diametricallyextended face-grooves 12. The wrist-blocks 1l are arranged to Work inpairs, and mounted to slide through the cooperating grooves 12 of each pair thereof is an oscillating lever 13. There are of course three of these levers 13, and each is, as shown, made up of laterallyspaced but rigidly-connected straps that quite closely tit between the plates 9 of the coperating cross-heads. The levers 13 are pivotally connected at 14 to lugs 14a of an adjustable fulcrum-block 15, which fulcrum-block is provided at its ends with arm extensions 16, that are pivoted at 17 to the sides of the frame 4. The pivot 17 is so located that by movement of the fulcrum-block 15 the axis of the pivot 14 may be moved into concentricity with the axis of the wrist-blocks 11. To provide for this adjustment of the fulcrum -block 15, it is provided at its sides with segmental racks 18, which meshwith smaller segmental racks 19, secured on a common rock-shaft 20, mounted in suitable bearings 21 on the frame 4. At one end the rockshaft 20 is provided with a segmental wormgear 22, with which coperates a worm or screw 23, carried by a shaft 24, which shaft is mounted in suitable bearing 25 on the frame 4 and is provided with a hand-wheel 26, by means of which itnay be turned. As is evident by the proper manipulations of the hand -wheel 26 and worm 23 actuated thereby the several segmental gears may be oscillated in the desired direction, and the fulcrum-block 15 may be set and securely held in any desired adjustment. In the drawings the fulcrum-blockis set to give the maximum throw to the cross-heads; but, as already indicated, by adjusting the same so that the pivots 14 are concentric with the aXes of the wrist-blocks 1l the movements of the crossheads will be reduced to zero.

The three cranks 3 are connected with their corresponding and coperating levers 13 by means of suitable pitmen 27, the lower ends of which are pivoted at 28 between the bifurcated free ends of said levers 13, so that the said pivots 28. are adapted to be moved concentric with the axes of the cooperating wristblocks 11.

The clutch mechanism, which is in reality a plurality of clutches,is substantially identical with that set forth and claimed in my pending application, Serial No. 33,044, filed October 15, 1900, entitled Reversible clutches. Hence as this clutch in itself forms no part of my present invention it may be here briefly described.

Between the bearings G of the frame 4 the driven shaft or axle 2 is provided with a longitudinally grooved or luted clutch-sleeve 29, which is shown as rigidly keyed thereto. On this clutch-sleeve 29 is a sleeve-like clutchre'versing cage 30, provided with a plurality of rectangular perforations orroller-seats 31, in which the driving-rollers 32 are loosely mounted, the rollers, as shown, being yieldingly held central by light springs (See Figs. 3, 8, and 9.) In the arrangement shown there are siX circumferentially-extended series of rollers 32 and seats 3l, and around each series of rollers is loosely mounted on the reversing-cage 30 an oscillating drivingring 34, of which rings there are of course six. The rollers 32 work as wedges between the inner surfaces of the driving-rings 34 and the concave surfaces of the grooves in the face of the clutch-sleeve 29. At one end the so-called reversing-cage 30 is providedwith a hub 35, formed with spiral cam-grooves 36, in which the internal keys 37 of a sliding clutch-reversing hub 38 Work with a camming action. The reversinghub 3S is directly mounted in one of the bearings 6 of the frame 4, and it is keyed at 39 to the driven shaft 2 for rotation therewith, but for sliding movement thereon. By means of a reversing-lever 40, which is shown as pivoted to the frame 4 at 41, and by means of a shipper-collar 42, pivotally connected between prongs of the said lever 40 and Working in a groove 43 of said hub 38, the said hub may be given longitudinal sliding movement on the shaft 2, and the so-called reversing-sleeve 30 may be thrown to an extreme position in either direction to reverse the action of the clutch or may be moved to an intermediate position to throw all of the clutches simultaneously out of action.

The clutch driving-rings 34 are provided with projecting ears 34. The ears 34n of the members,wl1ich constitute a reversely-acting pair, project in opposite directions and are connected by links 44 to the wrist-pins 10 of the same cross-head. With this construction it follows that the one member of a particular pair of driving-rings 34 will be making its operative stroke While the other is making its idle or return stroke. Since the driving-cranks are set one in advance of the, other, the cross-heads will be moved one in advance of the other, with the result that there is a constant application of power trans- IOO mitted to the driven Vshaft or aXle, under which action at a given instant the particular clutch driving-ring et'which is moving sion by the several driving-rings.

This power-transmission mechanism,while especially adapted for heavy Work, is neverthelesswelladaptedforlightwork,such asthat required in ordinary automobiles, and it will of course be understood that the mechanism above described is capable of a great many modifications Within the scope of my invention.

Theterm crank is of course used in a broad sense and would, as is obvious, include all forms of crank or eccentric devices.

The so-called cross-heads instead of being mounted in reciprocating guides might be mounted in oscillating guides. The clutch device may also take various forms. The invention is not limited to the illustrated construction of the cross-heads,wrist-blocks,and oscillating levers, although such construction is very important, as it permits of the ready adjustment of the parts to and from neutral or inoperative positions and khas other advantages, such as strength, simplicity, and compactness. i

What I claim, and desire to secure by Letters Patent of the United States, is as follows:

l. The combination with a driving-crank and a driven member, of a pitman driven by said crank, a cross-head with connections for action on said driven member, an adjustable fulcruin-block, and an oscillating lever pivoted at or near its extremities to said fulcrum-block and to said pitman, which lever has` an endwise adjustment with respect to said cross-head and acts thereon with avary- .ing leverage, under adjustments of said ful- Crum-block.

2. The' combination With a driving-crank, of a clutch, a cross-headwith connections for actuating said clutch, an adjustable fulcrumblock, an oscillating lever pivoted to said fulcrum-block and adjustable endwise With. respect to said cross-head and operating there.

on with a varying leverage under adj ustm ents of said fulcrnm -block, a pitman driven by said crank and pivoted to the vibrating end of said lever, and a driven shaft subject to saidclutch.

3. The combination with a driving-shaft having a plurality of cranks, of a corresponding plurality of cross-heads, clutches connectedY to said cross-heads in reversely acting pairs, an adjustable fulcrum-block, oscillating levers pivoted to said fulcrum-block and adjustable endWise With respect'to said crosshead and operating thereon, With correspondingly-varying leverages, under adjustments of said fulcrum-block, pitmen driven by said cranks and pivoted to the vibratingends of said levers, and a driven shaft subject to said clutches.

4. The combination With a driving-shaft,

of a clutch, a cross-head, connections for actuating said clutch, a Wrist-block pivoted in said cross-head, an adjustable fulcrum-block, an oscillating lever pivoted to said fulcrumblock and adjustable endwise through said wrist-block, a pitman connecting said driving-crank to the free end of said oscillating lever, and a driven shaft subject to said clutch.

5. The combinationwith a driving-crank, of a clutch, a cross-head, connections for actuating said clutch, laterally-spaced Wristblocks pivoted in said cross-head, an adjustable fulcrum-block, an oscillating lever pivoted to said fulcrum-block and adjustablev diametrically through said Wrist-blocks, its pivotal connection to said fulcrum-block being movable into concentricity Withthe axis of said Wrist-block, a pitman connecting said driving-crank to the freeend of said oscillating lever, and a driven shaft subject to said clutch. ,Y

6. The. combination with a driving-shaft having a plurality of cranks, of a plurality of "cross-heads, laterally-spaced Wrist-blocks piv A oted in said cross-heads, bifurcated oscillating levers mounted to slide endwisethrough dia- Ametrical seats in lsaid Wrist-blocks, a pivotally-adjustable fulcrum -block having lugs embraced by and pivoted to the fulcrumed ends of said oscillating levers, pitmen connecting said cranks to the `vibrating ends of said levers, a driven shaft, clutches acting on said driven shaft, and links connecting f said clutches to said cross-heads.

7. ,The combinationwith the driving-shaft having three cranks set onein advance of the other, ofthe three cross-heads With laterally,- spaced sides, the laterally-spaced Wrist-blocks mounted fin said cross-heads and provided with diametrical face-grooves, the bifurcated levers adjustable in the face-grooves of said lWrist blocks, the pitmen connecting said cranks to the `vibrating ends of saidlever, the

vers are pivoted, segmental gears on the sides pivotally-adjustable fulcrum-block having j lugs to which the fulcrumed ends of said leof said fulcrum-blocks, `a rock-shaft With gears meshing with vsaid segmental gears, a

Worm-gear on said rock-shaft, a hand-operated lshaft having a Worm cooperating With l said Worm-gear, a driven shaft, clutches acting on said driven shaft, and links connect- A ing said clutches with said cross-heads.

In testimony Whereofl aiix my signature,

in presence of two witnesses.

n WHITCOMB L. J UDSON. Witnesses: l 4 v M.` M. MoGRoRY, F. D. MERCHANT. 

